Detailed Instructions: In this task, you're given a context passage, followed by a question that needs to be answered. Based on the paragraph, you must write unambiguous answers to the questions and your answer must refer to a specific phrase from the paragraph. If multiple answers seem to exist, write the answer that is the most plausible.
Problem:Hello , I was asking about ordering a diamond today and the rep said since I got a touch within the last year I only qualified for a $ 75 rebate - which I certainly understand $ 150 is for a 2 year upgrade . What I didn't understand was the $ 100 mail in rebate wasn't available for people under 2 years - is that true ? I don't really know what the mail in rebate is about - is it online anywhere for me to see the terms and conditions ? On the plus side I told them BEFORE I order a new phone and sign up for a new contract they would have to see what they could do for me since my contract has expired . 
Question: What may have caused you to not use the $ 100 rebate ?
Solution:
I wasn't eligible for it .